ADDCO Rear Sway Bar 3/4” or 7/8” Diameter?

Thinking about installing a rear sway bar on my ‘69 Dart Swinger 340 that has the factory 7/8” diameter factory front sway bar and PST 1.03” diameter torsion bars.

I’m trying to decide between the 3/4” or 7/8” diameter ADDCO rear sway bar.

I’ve read that the 7/8” diameter rear sway bar might be overkill for a cruiser.

Any and opinions and experience appreciated.